© Afrisol

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AFRISOL - Sun at Work

SunBox

The Solution for Rural Electrificationby SHS

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AFRISOL - SunBox

Technical presentation

Rural Electrification

References

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SunBox – Technical Presentation

SunBox – integrated & compact SHS : the mainelements are gathered in a polyethylenehousing

Technical

Presentation

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SunBox - Battery

The SunBox is equipped with a sealed, gelified battery which doesn’t need any maintenance – no control of theelectrolyte level and no refilling with distilled water.Expected lifetime: 10 years – if the indicated daily power consumption is respected.High stability of the battery due to three separate fixing belts.

Three capacitiesare available:

- SB100: 100Ah- SB130: 130Ah- SB185: 185Ah

Technical

Presentation

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SunBox - Controller

Technical caracteristics:Nominal Voltage : 12VSolar module current : 10A3 load terminals of 5A eachRegulation type : PWM with 2 modes of regulation: constant current charging and constantvoltage charging (floating)

Models :SunControl: The basic controller version withoutprepayment system . This version is targeting the directsales into the private marketSunPay: The basic controller version contains apayment managing system through an electronic key.The SunPay is designed for rural electrification projectswith SHS,who require cash collecting of monthly fees and handling of several hundred clients.

Technical

Presentation

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SunBox - Controller

The controller has 3 independentload terminals. In case of deepdischarge, the load terminals are cut off progressively – one afteranother . This way, the end useris warned that the battery has reached a low level of charge andavoids to be suddenly without electricty.Each load terminal is protected by an electronic fuse- no replacement of mechanical fuses, which is themain source of failures and manipulations.The controller is integrated inside the SunBox. The frontpanel of the controller is visualizing the system status : charging, deep discharge, short-circuits and the credit status of the SunPay version.

Technical

Presentation

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SunBox - Installation

The solar module and the jonction box for the loads are connected with the SunBox by two irreversible 12 Volt automotive plugs.

The power supply cable to the solar module and the junction box are prefabricated in the factory.This makes the installation and the commissioning of the system very easy . The risk of wrongconnexions and bad contacts is excluded

Technical

Presentation

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SunBox - Installation

The Plug&Play method makes the installation fast and easy. No need of training solar specialists – it can be done by every building electricien.To guide the installer, the 3 load terminals of the jonction box aremarked by pictograms (lights & TV) The SunBox is designed as a furniture and can be placed everywhere in the house – even in the living room.

Technical

Presentation

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SunBox – Performances

System performances

380 Wh/day

260 Wh/day

190 Wh/day

Average power consumption

1 TV colour (30W) : 6h/day1 light 11W : 4h/day3 lights 7W : 2h/day

80 W peakSunBox 130

1 TV colour (30W) : 7h/day2 lights 11W : 4h/day4 lights 7W : 3h/day

120 W peakSunBox 185

1 TV b/w (18W) : 6h/day1 light 11W : 4h/day3 lights 7W : 2h/ day

60 W peakSunBox 100

ExamplesSolar Panel *

Technical

Presentation

System autonomy : 3 days

* Irradiation of 5 kWh/day per m²

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SunBox – Rural Electrification

In most cases, big scale rural electrification projects bySHS (often subsidised by governments), require partly contribution of the beneficiary in order to finance thesystem, for example, by the payment of monthly fees. The operator’s task is to assure the collection of the feesand to set up a system to administrate the payments and the clients.The SunBox – SunPay version has been designed for thiskind of applications. Its functionality can be modified andadapted to each kind of operation model desired by the operator:

- credit sales- fee for servicing- electricity sales

Rural

Electrification

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SunBox – Rural ElectrificationThe end user pays the monthly fee at the local agency which reloads the creditkey named I-Button.

The charged credit key has just to be placed on thecontact point of controller front panel and the system isreleasing the load terminals.Once the credit is expired, the system interrupts the loads.At each recharge of the key, the technical parameters ofthe SHS will automatically be transmitted to the operatorIn case of irregularities, the data status of each clientallows to determinate the cause .

Rural

Electrification

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SunBox – Rural Electrification

Administration model

Local operator Household with

SunBox (client)Administrationheadquarter

€€€€

UnitsRural

Electrification Data Data

Electricity in exchange ofpayment ofmonthly fees

Centralised sales pointfor collection and transferRecharging of the credit key (e.g. monthly units or Ah units)Transfer of system datas

Centralised administrationof monthly feesGlobal analysis of the system dataInterface to the company’s informatic bookkeeping

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SunBox – Rural Electrification

Project Tools

Handhold unit SunCollectThe SunCollect is the main tool of thelocal operator.

Equipped with rechargeable batteries it allows a great mobility.

Flexibility of recharging the key viatwo standard modes of programming :- adding one month of credit- fixed deadline

Instant visualization of the SHS systemparameters (power consumption control)

Rural

Electrification

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SunBox – Rural Electrification

Project Tools

Data analyseThe memory of the SunCollect allows to store the data of severalhundred systems. After the transfer to a computer, all data can be analysed by a software. It is possible to establish a power consumption status for each client.

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Module energy

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Rural

Electrification

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SunBox – Rural Electrification

Project Tools

For large rural electrification projects, the customer data can be made available via internet. The project manager (for ex. the electricity utility) has access to the database and can display all needed data (power consumption graph, payment status...) – at any time and from any place of the world.

Online tool mySunBox

Rural

Electrification

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SunBox – Rural Electrification

Project ToolsCustomer passport with credit stampsThe SHS - SunPay is delivered with a « Customer Passeport » (book in A6 format) which the client receives after the installation. At each recharge of the key, the local operator sticks a adhesive stamp at the reserved zone in the booklet.

This allows the user to verify his account status of payments. The operateur buys a block of stamps at the central headquarters. With this method, the transfer of the funds can be controlled and booked in a easy way. The passeport contains as well a zone reserved for eventuel technical interventions.

Rural

Electrification

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SunBox - Reference

Pilote project in the province of Benslimane (july 2003)

Equipment of 345 rural houses dispersedover an area of 500km² - mountainous terrain

References

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SunBox - Reference

2 Rural communities (Sidi Bettache & Bir Nasr)14 Villages2 weekly country markets

References

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SunBox - Reference

2 local operators + 1 supervisor

References

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SunBox - References

345 clients

References